Alright, let's solve this math problem step by step. First, we have the number 70. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 309. So, we're going to take the number 70 and add it to itself 309 times.
Step 1: 0 + 70 = 70
Step 2: 70 + 70 = 140
Step 3: 140 + 70 = 210
Step 4: 210 + 70 = 280
Step 5: 280 + 70 = 350
Step 6: 350 + 70 = 420
Step 7: 420 + 70 = 490
Step 8: 490 + 70 = 560
Step 9: 560 + 70 = 630
Step 10: 630 + 70 = 700
Step 11: 700 + 70 = 770
Step 12: 770 + 70 = 840
Step 13: 840 + 70 = 910
Step 14: 910 + 70 = 980
Step 15: 980 + 70 = 1050
Step 16: 1050 + 70 = 1120
Step 17: 1120 + 70 = 1190
Step 18: 1190 + 70 = 1260
Step 19: 1260 + 70 = 1330
Step 20: 1330 + 70 = 1400
Step 21: 1400 + 70 = 1470
Step 22: 1470 + 70 = 1540
Step 23: 1540 + 70 = 1610
Step 24: 1610 + 70 = 1680
Step 25: 1680 + 70 = 1750
Step 26: 1750 + 70 = 1820
Step 27: 1820 + 70 = 1890
Step 28: 1890 + 70 = 1960
Step 29: 1960 + 70 = 2030
Step 30: 2030 + 70 = 2100
Step 31: 2100 + 70 = 2170
Step 32: 2170 + 70 = 2240
Step 33: 2240 + 70 = 2310
Step 34: 2310 + 70 = 2380
Step 35: 2380 + 70 = 2450
Step 36: 2450 + 70 = 2520
Step 37: 2520 + 70 = 2590
Step 38: 2590 + 70 = 2660
Step 39: 2660 + 70 = 2730
Step 40: 2730 + 70 = 2800
Step 41: 2800 + 70 = 2870
Step 42: 2870 + 70 = 2940
Step 43: 2940 + 70 = 3010
Step 44: 3010 + 70 = 3080
Step 45: 3080 + 70 = 3150
Step 46: 3150 + 70 = 3220
Step 47: 3220 + 70 = 3290
Step 48: 3290 + 70 = 3360
Step 49: 3360 + 70 = 3430
Step 50: 3430 + 70 = 3500
Step 51: 3500 + 70 = 3570
Step 52: 3570 + 70 = 3640
Step 53: 3640 + 70 = 3710
Step 54: 3710 + 70 = 3780
Step 55: 3780 + 70 = 3850
Step 56: 3850 + 70 = 3920
Step 57: 3920 + 70 = 3990
Step 58: 3990 + 70 = 4060
Step 59: 4060 + 70 = 4130
Step 60: 4130 + 70 = 4200
Step 61: 4200 + 70 = 4270
Step 62: 4270 + 70 = 4340
Step 63: 4340 + 70 = 4410
Step 64: 4410 + 70 = 4480
Step 65: 4480 + 70 = 4550
Step 66: 4550 + 70 = 4620
Step 67: 4620 + 70 = 4690
Step 68: 4690 + 70 = 4760
Step 69: 4760 + 70 = 4830
Step 70: 4830 + 70 = 4900
Step 71: 4900 + 70 = 4970
Step 72: 4970 + 70 = 5040
Step 73: 5040 + 70 = 5110
Step 74: 5110 + 70 = 5180
Step 75: 5180 + 70 = 5250
Step 76: 5250 + 70 = 5320
Step 77: 5320 + 70 = 5390
Step 78: 5390 + 70 = 5460
Step 79: 5460 + 70 = 5530
Step 80: 5530 + 70 = 5600
Step 81: 5600 + 70 = 5670
Step 82: 5670 + 70 = 5740
Step 83: 5740 + 70 = 5810
Step 84: 5810 + 70 = 5880
Step 85: 5880 + 70 = 5950
Step 86: 5950 + 70 = 6020
Step 87: 6020 + 70 = 6090
Step 88: 6090 + 70 = 6160
Step 89: 6160 + 70 = 6230
Step 90: 6230 + 70 = 6300
Step 91: 6300 + 70 = 6370
Step 92: 6370 + 70 = 6440
Step 93: 6440 + 70 = 6510
Step 94: 6510 + 70 = 6580
Step 95: 6580 + 70 = 6650
Step 96: 6650 + 70 = 6720
Step 97: 6720 + 70 = 6790
Step 98: 6790 + 70 = 6860
Step 99: 6860 + 70 = 6930
Step 100: 6930 + 70 = 7000
Step 101: 7000 + 70 = 7070
Step 102: 7070 + 70 = 7140
Step 103: 7140 + 70 = 7210
Step 104: 7210 + 70 = 7280
Step 105: 7280 + 70 = 7350
Step 106: 7350 + 70 = 7420
Step 107: 7420 + 70 = 7490
Step 108: 7490 + 70 = 7560
Step 109: 7560 + 70 = 7630
Step 110: 7630 + 70 = 7700
Step 111: 7700 + 70 = 7770
Step 112: 7770 + 70 = 7840
Step 113: 7840 + 70 = 7910
Step 114: 7910 + 70 = 7980
Step 115: 7980 + 70 = 8050
Step 116: 8050 + 70 = 8120
Step 117: 8120 + 70 = 8190
Step 118: 8190 + 70 = 8260
Step 119: 8260 + 70 = 8330
Step 120: 8330 + 70 = 8400
Step 121: 8400 + 70 = 8470
Step 122: 8470 + 70 = 8540
Step 123: 8540 + 70 = 8610
Step 124: 8610 + 70 = 8680
Step 125: 8680 + 70 = 8750
Step 126: 8750 + 70 = 8820
Step 127: 8820 + 70 = 8890
Step 128: 8890 + 70 = 8960
Step 129: 8960 + 70 = 9030
Step 130: 9030 + 70 = 9100
Step 131: 9100 + 70 = 9170
Step 132: 9170 + 70 = 9240
Step 133: 9240 + 70 = 9310
Step 134: 9310 + 70 = 9380
Step 135: 9380 + 70 = 9450
Step 136: 9450 + 70 = 9520
Step 137: 9520 + 70 = 9590
Step 138: 9590 + 70 = 9660
Step 139: 9660 + 70 = 9730
Step 140: 9730 + 70 = 9800
Step 141: 9800 + 70 = 9870
Step 142: 9870 + 70 = 9940
Step 143: 9940 + 70 = 10010
Step 144: 10010 + 70 = 10080
Step 145: 10080 + 70 = 10150
Step 146: 10150 + 70 = 10220
Step 147: 10220 + 70 = 10290
Step 148: 10290 + 70 = 10360
Step 149: 10360 + 70 = 10430
Step 150: 10430 + 70 = 10500
Step 151: 10500 + 70 = 10570
Step 152: 10570 + 70 = 10640
Step 153: 10640 + 70 = 10710
Step 154: 10710 + 70 = 10780
Step 155: 10780 + 70 = 10850
Step 156: 10850 + 70 = 10920
Step 157: 10920 + 70 = 10990
Step 158: 10990 + 70 = 11060
Step 159: 11060 + 70 = 11130
Step 160: 11130 + 70 = 11200
Step 161: 11200 + 70 = 11270
Step 162: 11270 + 70 = 11340
Step 163: 11340 + 70 = 11410
Step 164: 11410 + 70 = 11480
Step 165: 11480 + 70 = 11550
Step 166: 11550 + 70 = 11620
Step 167: 11620 + 70 = 11690
Step 168: 11690 + 70 = 11760
Step 169: 11760 + 70 = 11830
Step 170: 11830 + 70 = 11900
Step 171: 11900 + 70 = 11970
Step 172: 11970 + 70 = 12040
Step 173: 12040 + 70 = 12110
Step 174: 12110 + 70 = 12180
Step 175: 12180 + 70 = 12250
Step 176: 12250 + 70 = 12320
Step 177: 12320 + 70 = 12390
Step 178: 12390 + 70 = 12460
Step 179: 12460 + 70 = 12530
Step 180: 12530 + 70 = 12600
Step 181: 12600 + 70 = 12670
Step 182: 12670 + 70 = 12740
Step 183: 12740 + 70 = 12810
Step 184: 12810 + 70 = 12880
Step 185: 12880 + 70 = 12950
Step 186: 12950 + 70 = 13020
Step 187: 13020 + 70 = 13090
Step 188: 13090 + 70 = 13160
Step 189: 13160 + 70 = 13230
Step 190: 13230 + 70 = 13300
Step 191: 13300 + 70 = 13370
Step 192: 13370 + 70 = 13440
Step 193: 13440 + 70 = 13510
Step 194: 13510 + 70 = 13580
Step 195: 13580 + 70 = 13650
Step 196: 13650 + 70 = 13720
Step 197: 13720 + 70 = 13790
Step 198: 13790 + 70 = 13860
Step 199: 13860 + 70 = 13930
Step 200: 13930 + 70 = 14000
Step 201: 14000 + 70 = 14070
Step 202: 14070 + 70 = 14140
Step 203: 14140 + 70 = 14210
Step 204: 14210 + 70 = 14280
Step 205: 14280 + 70 = 14350
Step 206: 14350 + 70 = 14420
Step 207: 14420 + 70 = 14490
Step 208: 14490 + 70 = 14560
Step 209: 14560 + 70 = 14630
Step 210: 14630 + 70 = 14700
Step 211: 14700 + 70 = 14770
Step 212: 14770 + 70 = 14840
Step 213: 14840 + 70 = 14910
Step 214: 14910 + 70 = 14980
Step 215: 14980 + 70 = 15050
Step 216: 15050 + 70 = 15120
Step 217: 15120 + 70 = 15190
Step 218: 15190 + 70 = 15260
Step 219: 15260 + 70 = 15330
Step 220: 15330 + 70 = 15400
Step 221: 15400 + 70 = 15470
Step 222: 15470 + 70 = 15540
Step 223: 15540 + 70 = 15610
Step 224: 15610 + 70 = 15680
Step 225: 15680 + 70 = 15750
Step 226: 15750 + 70 = 15820
Step 227: 15820 + 70 = 15890
Step 228: 15890 + 70 = 15960
Step 229: 15960 + 70 = 16030
Step 230: 16030 + 70 = 16100
Step 231: 16100 + 70 = 16170
Step 232: 16170 + 70 = 16240
Step 233: 16240 + 70 = 16310
Step 234: 16310 + 70 = 16380
Step 235: 16380 + 70 = 16450
Step 236: 16450 + 70 = 16520
Step 237: 16520 + 70 = 16590
Step 238: 16590 + 70 = 16660
Step 239: 16660 + 70 = 16730
Step 240: 16730 + 70 = 16800
Step 241: 16800 + 70 = 16870
Step 242: 16870 + 70 = 16940
Step 243: 16940 + 70 = 17010
Step 244: 17010 + 70 = 17080
Step 245: 17080 + 70 = 17150
Step 246: 17150 + 70 = 17220
Step 247: 17220 + 70 = 17290
Step 248: 17290 + 70 = 17360
Step 249: 17360 + 70 = 17430
Step 250: 17430 + 70 = 17500
Step 251: 17500 + 70 = 17570
Step 252: 17570 + 70 = 17640
Step 253: 17640 + 70 = 17710
Step 254: 17710 + 70 = 17780
Step 255: 17780 + 70 = 17850
Step 256: 17850 + 70 = 17920
Step 257: 17920 + 70 = 17990
Step 258: 17990 + 70 = 18060
Step 259: 18060 + 70 = 18130
Step 260: 18130 + 70 = 18200
Step 261: 18200 + 70 = 18270
Step 262: 18270 + 70 = 18340
Step 263: 18340 + 70 = 18410
Step 264: 18410 + 70 = 18480
Step 265: 18480 + 70 = 18550
Step 266: 18550 + 70 = 18620
Step 267: 18620 + 70 = 18690
Step 268: 18690 + 70 = 18760
Step 269: 18760 + 70 = 18830
Step 270: 18830 + 70 = 18900
Step 271: 18900 + 70 = 18970
Step 272: 18970 + 70 = 19040
Step 273: 19040 + 70 = 19110
Step 274: 19110 + 70 = 19180
Step 275: 19180 + 70 = 19250
Step 276: 19250 + 70 = 19320
Step 277: 19320 + 70 = 19390
Step 278: 19390 + 70 = 19460
Step 279: 19460 + 70 = 19530
Step 280: 19530 + 70 = 19600
Step 281: 19600 + 70 = 19670
Step 282: 19670 + 70 = 19740
Step 283: 19740 + 70 = 19810
Step 284: 19810 + 70 = 19880
Step 285: 19880 + 70 = 19950
Step 286: 19950 + 70 = 20020
Step 287: 20020 + 70 = 20090
Step 288: 20090 + 70 = 20160
Step 289: 20160 + 70 = 20230
Step 290: 20230 + 70 = 20300
Step 291: 20300 + 70 = 20370
Step 292: 20370 + 70 = 20440
Step 293: 20440 + 70 = 20510
Step 294: 20510 + 70 = 20580
Step 295: 20580 + 70 = 20650
Step 296: 20650 + 70 = 20720
Step 297: 20720 + 70 = 20790
Step 298: 20790 + 70 = 20860
Step 299: 20860 + 70 = 20930
Step 300: 20930 + 70 = 21000
Step 301: 21000 + 70 = 21070
Step 302: 21070 + 70 = 21140
Step 303: 21140 + 70 = 21210
Step 304: 21210 + 70 = 21280
Step 305: 21280 + 70 = 21350
Step 306: 21350 + 70 = 21420
Step 307: 21420 + 70 = 21490
Step 308: 21490 + 70 = 21560
Step 309: 21560 + 70 = 21630

So, 70*309 = 21630